Brummett Anna Ruth, Dumont James N, Larkin Jeanne R
Department of Biology, Oberlin College, Oberlin, Ohio 44074.
Biology Division. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830.
J Morphol. 1982 Jul;173(1):1-16. doi: 10.1002/jmor.1051730102.
Scanning and transmission electron microscopy, together with dissection and light microscopy, have produced heretofore unavailable structural detail of the ovary of Fundulus heteroclitus. Structural and functional interrelationships among developing follicles and other histological elements, particularly as they might relate to vascularization of follicles, oocyte development, and ovulation, are described and discussed. Mature eggs, ovulated into the ovarian lumen, accumulate in the posterior "ovisac" region of the ovary prior to oviposition. This "ovisac" region is thin-walled and apparently nongerminal. The temporary retention of ovulated eggs permits cyclical oviposition even though oogenesis and ovulation are asynchronous. The histological differences between the ovisac and the anterior ovigerous of the ovary are described. The lumenal epithelium of the ovisac displays a localized population of unusual cells with long cytoplasmic extensions. The ultrastructure of these cells suggests that they might function in the transport of ovulated eggs into the oviduct and/or in secreting the substance ("jelly") which forms the surface coat of extruded eggs.
扫描电子显微镜和透射电子显微镜，连同解剖学和光学显微镜，揭示了迄今未有的底鳉卵巢结构细节。文中描述并讨论了发育中的卵泡与其他组织学成分之间的结构和功能相互关系，特别是它们与卵泡血管化、卵母细胞发育和排卵的关系。成熟卵子排入卵巢腔后，在产卵前积聚在卵巢后部的“卵囊”区域。这个“卵囊”区域壁薄，显然无生殖细胞。即使卵子发生和排卵不同步，排卵后卵子的暂时保留也允许周期性产卵。文中描述了卵囊与卵巢前部产卵区之间的组织学差异。卵囊的腔上皮显示出一群具有长细胞质延伸的特殊细胞。这些细胞的超微结构表明，它们可能在将排卵后的卵子运输到输卵管中发挥作用，和/或在分泌形成排出卵子表面涂层的物质（“胶状物”）方面发挥作用。
